JP5567694B2 - 曲げ最適化マルチモードファイバのdmd特性の改善 - Google Patents
曲げ最適化マルチモードファイバのdmd特性の改善 Download PDFInfo
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- JP5567694B2 JP5567694B2 JP2012552955A JP2012552955A JP5567694B2 JP 5567694 B2 JP5567694 B2 JP 5567694B2 JP 2012552955 A JP2012552955 A JP 2012552955A JP 2012552955 A JP2012552955 A JP 2012552955A JP 5567694 B2 JP5567694 B2 JP 5567694B2
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- 238000005452 bending Methods 0.000 title description 17
- 239000000835 fiber Substances 0.000 title description 17
- 230000006872 improvement Effects 0.000 title description 3
- 239000013307 optical fiber Substances 0.000 claims description 60
- 238000005253 cladding Methods 0.000 claims description 19
- 235000012239 silicon dioxide Nutrition 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 5
- 239000010453 quartz Substances 0.000 claims 2
- 238000013461 design Methods 0.000 description 22
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000001934 delay Effects 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000638 styrene acrylonitrile Polymers 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
- G02B6/0281—Graded index region forming part of the central core segment, e.g. alpha profile, triangular, trapezoidal core
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02042—Multicore optical fibres
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
- G02B6/0288—Multimode fibre, e.g. graded index core for compensating modal dispersion
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
- G02B6/03638—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
- G02B6/03638—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only
- G02B6/0365—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only arranged - - +
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
- G02B6/03661—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 4 layers only
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Optical Communication System (AREA)
- Optical Couplings Of Light Guides (AREA)
Description
n(r)=[n1 2−(n1 2−nclad 2)(r/R2)α]1/2 (1)
ここでrはファイバの半径、n1はコア中心部の屈折率、R2はコアの半径、ncladはクラッドの屈折率、αは自由パラメータである。これはいわゆる理想的なα型(アルファコア)プロファイルであり、ここでαは通常1.7から2.2の値を有する。従来型の光ファイバプロファイルにおいては、アルファコアは指数曲線が、一般的なMMF設計においてデルタがゼロ(純シリカの屈折率)であるncladと交差する点まで半径方向外側に伸びるが、必ずしも必須ではない。
R1=R2*[(n1 2−ns 2)/(n1 2−nclad 2)]1/α
アルファコア領域 − 上に規定されるように、屈折率デルタn1を備える光ファイバの中心から半径方向に距離R1まで延びる本質的にアルファプロファイルを備える領域である。
棚 − 屈折率デルタがnsであって、R1から半径R3まで半径方向外側に延びる領域である。R3−R1は好ましくは0.1から3ミクロンの範囲であり、かつ好ましくはデルタnsは約0.001から0.006の範囲内である。
内側クラッド − 0.5ミクロンよりも大きい、好ましくは0.5から12ミクロンの距離で屈折率デルタがncladであるR3から半径方向に延びる領域である。
溝 − 通常、−0.002よりも小さい屈折率デルタ(ntrench−nclad)、、および2ミクロンよりも大きい溝幅を備え、内側クラッドと外側クラッドとの間に延びる領域である。
外側クラッド − 溝領域から半径方向外側に延びる領域である。
12、32 肩部
13、33 溝
14、34 外側クラッド
35 肩部差
51 棚
Claims (12)
- 中心部と、前記中心部から半径方向外側に延びる以下の一連の同心領域を含むマルチモード光ファイバであって、前記一連の同心領域が、
前記光ファイバの前記中心部から半径方向に距離R1まで延びる本質的にアルファプロファイルを有するアルファコア領域であって、コア中心部の屈折率がn1である、前記アルファコア領域と、
屈折率差ns−ncladにより規定される、前記R1における屈折率の肩部差であって、nsが前記R1における屈折率であり、ncladが前記R1から0.5ミクロンより大きな距離まで半径方向外側に延びる内側クラッド領域の屈折率である、前記屈折率の肩部差と、
前記内側クラッドから半径方向に延びる溝領域と、
前記溝領域から半径方向外側に延びる外側クラッド領域とである、マルチモード光ファイバ。 - (ns −n clad )の絶対値が約0.001から約0.003の範囲である、請求項1に記載のマルチモード光ファイバ。
- (n1−nclad)の値が約0.005から約0.03の範囲である、請求項1に記載のマルチモード光ファイバ。
- (n1−nclad)が約0.014から約0.02の範囲である、請求項1に記載のマルチモード光ファイバ。
- 比(ns−nclad)/(n1−nclad)が約0.02から約0.2の範囲である、請求項1に記載のマルチモード光ファイバ。
- 前記R1が約12から約34ミクロンの範囲である、請求項1に記載のマルチモード光ファイバ。
- n quartz が純シリカの屈折率である場合に、(nclad−nquartz)がおおよそ0である、請求項2に記載のマルチモード光ファイバ。
- 前記内側クラッド領域が前記R1から約0.5ミクロンから約12ミクロンの範囲の距離まで半径方向外側に延びる、請求項1に記載のマルチモード光ファイバ。
- 前記溝が−0.002より小さい屈折率デルタ(ntrench−nclad)と2ミクロンより大きい幅を備える、請求項1に記載のマルチモード光ファイバ。
- 高次モードのモード遅延が低次主モードのモード遅延に等しくなるように前記同心の領域が構成される、請求項1に記載のマルチモード光ファイバ。
- 垂直共振器面発光レーザに結合される請求項1に記載の光ファイバを備える光ファイバサブシステム。
- a)レーザトランスミッタと、
b)光レシーバと、
c)前記トランスミッタと前記レシーバとの間に結合される請求項1に記載のマルチモード光ファイバとを備える、光システム。
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US30269610P | 2010-02-09 | 2010-02-09 | |
US61/302,696 | 2010-02-09 | ||
US30660710P | 2010-02-22 | 2010-02-22 | |
US61/306,607 | 2010-02-22 | ||
US13/023,938 US8737791B2 (en) | 2010-02-09 | 2011-02-09 | DMD performance in bend optimized multimode fiber |
US13/023,938 | 2011-02-09 | ||
PCT/US2011/024202 WO2011100333A1 (en) | 2010-02-09 | 2011-02-09 | Improvement of dmd performance in bend optimized multimode fiber |
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JP2013519123A JP2013519123A (ja) | 2013-05-23 |
JP5567694B2 true JP5567694B2 (ja) | 2014-08-06 |
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JP2012552955A Active JP5567694B2 (ja) | 2010-02-09 | 2011-02-09 | 曲げ最適化マルチモードファイバのdmd特性の改善 |
Country Status (5)
Country | Link |
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US (1) | US8737791B2 (ja) |
EP (1) | EP2534511A4 (ja) |
JP (1) | JP5567694B2 (ja) |
CN (1) | CN102884458B (ja) |
WO (1) | WO2011100333A1 (ja) |
Families Citing this family (13)
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FR2946436B1 (fr) | 2009-06-05 | 2011-12-09 | Draka Comteq France | Fibre optique multimode a tres large bande passante avec une interface coeur-gaine optimisee |
US9075183B2 (en) * | 2009-08-17 | 2015-07-07 | Ofs Fitel, Llc | Optical fibers with truncated cores |
WO2011100333A1 (en) | 2010-02-09 | 2011-08-18 | Ofs Fitel, Llc | Improvement of dmd performance in bend optimized multimode fiber |
EP2506044A1 (en) * | 2011-03-29 | 2012-10-03 | Draka Comteq B.V. | Multimode optical fiber |
US8948559B2 (en) * | 2012-09-05 | 2015-02-03 | Ofs Fitel, Llc | Multiple LP mode fiber designs for mode division multiplexing |
US9671552B2 (en) * | 2012-09-05 | 2017-06-06 | Ofs Fitel, Llc | 9 LP-mode fiber designs for mode-division multiplexing |
US9709731B2 (en) * | 2012-09-05 | 2017-07-18 | Ofs Fitel, Llc | Multiple LP-mode fiber designs for mode-division multiplexing |
DE102013200165B4 (de) * | 2012-10-12 | 2019-09-19 | J-Fiber Gmbh | Lichtleitfaser in Form einer biegeunempfindlichen Multimodefaser und deren Verwendung |
CN105334570B (zh) * | 2015-11-26 | 2018-10-09 | 长飞光纤光缆股份有限公司 | 一种低衰减弯曲不敏感单模光纤 |
EP3387763B1 (en) * | 2015-12-07 | 2023-11-01 | Draka Comteq B.V. | Method for selecting wide-band multimode fibers from a single wavelength characterization |
US10295734B2 (en) | 2016-05-17 | 2019-05-21 | Corning Incorporated | Optical fiber for both multimode and single-mode operation and transmission system therefor |
CN113885121A (zh) * | 2021-09-30 | 2022-01-04 | 中天科技光纤有限公司 | 多模光纤 |
CN113985520A (zh) * | 2021-11-11 | 2022-01-28 | 桂林电子科技大学 | 一种大模场单模传输光纤 |
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2011
- 2011-02-09 WO PCT/US2011/024202 patent/WO2011100333A1/en active Application Filing
- 2011-02-09 US US13/023,938 patent/US8737791B2/en active Active
- 2011-02-09 CN CN201180013759.8A patent/CN102884458B/zh active Active
- 2011-02-09 JP JP2012552955A patent/JP5567694B2/ja active Active
- 2011-02-09 EP EP11742737.7A patent/EP2534511A4/en active Pending
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US8737791B2 (en) | 2014-05-27 |
US20110194827A1 (en) | 2011-08-11 |
CN102884458B (zh) | 2016-04-13 |
CN102884458A (zh) | 2013-01-16 |
EP2534511A4 (en) | 2017-12-27 |
EP2534511A1 (en) | 2012-12-19 |
WO2011100333A1 (en) | 2011-08-18 |
JP2013519123A (ja) | 2013-05-23 |
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